ABB SACE Emax 2 Series Operating Instructions Manual page 289

Faults, causes and remedies The following is a list of possible fault situations, their possible causes and suggestions for resolving
286 | © 2023 ABB | 1SDH001330R1002 - ECN000297030
them.
Faults Possible causes
The trip signal of the protection trip
unit has not been reset
The open-position key lock or
padlock is activated
The circuit-breaker is in an
intermediate position between
The circuit-breaker
connected and isolated for test
doesn't close when the
or between isolated for test and
closing pushbutton is
disconnected
pressed
The undervoltage coil is not
energized
The opening coil is permanently
energized
The trip unit pushbutton is pressed
(withdrawable version)
The trip signal of the protection trip
unit has not been reset
The power supply voltage of the
auxiliary circuits is too low
The power supply voltage is
different from that indicated on the
rating plate
The cables of the coil are not
inserted correctly in the terminals
The connections in the power
supply circuit are wrong
The closing coil is damaged
The circuit-breaker
doesn't close when the
The operating mechanism is
closing coil is powered
blocked
The open position key lock is
activated
The circuit-breaker is in an
intermediate position between
connected and test or the trip
unit pushbutton is pressed
(withdrawable version)
The undervoltage coil is not
energized
The opening coil is permanently
energized
The racking out crank handle is
inserted (withdrawable version)
The circuit-breaker
doesn't open when the The operating mechanism is
opening pushbutton is blocked
pressed
ABB | SACE Emax 2
Suggestions
Press the TU mechanical reset
pushbutton or operate the electrical
reset remotely.
Unlock the lock in open position
using the relevant key
Complete the rack-in operation
Check the power supply circuit and
the power supply voltage
Correct operating condition.
Rotate the crank to complete
Press the TU Reset button
Measure the voltage: it should not
be lower than 70% of the rated
voltage of the coil
Check the voltage on the rating
plate
Make sure there is continuity
between cable and terminal and if
necessary reconnect the cables of
the coil to the terminals
Check the connections using the
relevant wiring diagram
Replace the coil
Perform the closing operation
manually; if the fault persists
contact ABB
Unlock the lock in open position
using the relevant key
Complete the rack-in operation
Make sure that undervoltage coil is
energized properly
Correct operating condition. If
necessary, disconnect the power
from the opening coil
Remove the crank
Contact ABB
Continued on the next page
Alarms or failures
1 - Identification of alarms or failures